Modelling of 25 storey building with the specified properties using ETABS

Open ETABs software click on new model and 

Then dialog box appears click on custom grid spacing click on edit grid data set x and y ordinate 

Click on custom story data and edit data story 

Then dialog box appears on screen create 25 story for model and click on ok

Step 2

Go to define tab and click on material 

One dialog box appears on the screen 

Click on add new material and fill all necessary details and click ok

Again dialog box appears on screen fill all details click on ok

Setp 3

Go to define tab 

Click on section properties and frame section 

 

One dialog box appear on screen 

Click on add new properties and Again dialog box will appear 

 

Select rectangular section and Again dialog box will appear give property name as B 300X400 Material as M30

 

Click on modify/ shown bar dialog box appears on screen 

Then click ok and again click on new property then dialog box appears 

 

Then click ok two times 

Step 4

Go to define tab click and section property and slab section 

 

Dialog box appears on screen 

 

 Click on add new property Again dialog box will open 

 

Then click ok 

Step 5

Go to define tab click on load pattern

Dialog box will appear and gives required details 

 

Click EQX and also modify lateral load 

 

Then dialog box appears and fill all details 

Click ok and do it same as EQY 

 

Click ok

Step 6 

Go to define ta click on mass source 

 

Dialog box will open and click on modify/ show mass source 

 

Again dialog box will open and fill all details 

Click ok 2 times 

Step 7

Go to define tab click on load cases

 

Dialog box appears  

 

Click ok

Step 8

Go to define tab click on load combination 

 

Dialog box will open 

Click add default design combination 

Step 9

Click draw column symbol in properties of objects select as C800X800mm

 

Click to draw column on required position

 

Click quick draw beams select property as B300X300mm create beams use replicate options 

Step 10

Go to plan options select story 1

 

Click on apply and ok 

Then floor get created 

Step 11

Go to select properties and frame section Then dialog box appears select B300X400mm click select and Close 

 

Step 12

Go to assign click on frame load distribution Then Dialog box will open and take all the details Click apply and ok

 

Go to select and select properties slab section 

 

Dialog box appear and select s150 

 

Click select and Close Go to assign click on shell loads as uniform 

 

Give load pattern name and all details 

 

Click apply and ok

Go to select and select properties and slab section 

Then select s150

 

Click on select and Close 

Go to assign tab click on shell as diaphragm 

 

Select D1

 

Click apply and ok

 

Step 13

Click on run analysis choose appropriate folder and click on save 

For result model periods of different models 

 

Go to display tab click on show response plot box will open 

 

Result 

Criteria		Desirable solution	Excersie result
Fundamental translation natural period	X-Direction	4.4 sec	4.41
	Y-Dorection	4.2 sec	4.22
Torsional irregularity	IS 1893-2016 (Part-1) Table -5	Torsional mode time tahn X and Y direction time periods	Yes
Vertical irregularity	IS 1893-2016(Part-1) Table-6 Clause -7	First three mode together should contribute at least 65% in amss participation factor in  each principle direction	Yes
		Fundamental lateral natural period in two principal plane direction are way from each other by at least 10%	No
Inter-storey drift	IS 1893-2016(Part-1) Clause-7.11.1.1	Storey drift shall not exceed 0.004 times the storey heigher for base shear with no load factors (4x10^-3)	Yes